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PetroChina Lanzhou Petrochemical Co., Ltd.
- Product Name: PetroChina Lanzhou Petrochemical Co., Ltd.
- Factroy Site: Yudu County, Ganzhou, Jiangxi, China
- Price Inquiry: sales3@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- PetroChina Lanzhou Petrochemical Co., Ltd. is a petroleum-derived chemical product in bulk industrial form, commonly used in petrochemical refining and polymer production, where high-temperature and high-pressure process control is required.
| HS Code | 210336 |
| Product Name | High-Density Polyethylene (HDPE) |
| Company | PetroChina Lanzhou Petrochemical Co., Ltd. |
| Product Type | Thermoplastic resin |
| Chemical Formula | (C2H4)n |
| Cas Number | 9002-88-4 |
| Appearance | White opaque granules or pellets |
| Density | 0.941-0.965 g/cm³ |
| Melting Point | 120-140°C |
| Tensile Strength | 20-35 MPa |
| Application | Packaging, pipes, bottles, injection-molded parts |
| Packaging | 25 kg woven bags or bulk bags |
| Storage Condition | Store in cool, dry, well-ventilated area away from sunlight |
| Safety Remark | Non-toxic, combustible; avoid open flames |
As an accredited PetroChina Lanzhou Petrochemical Co., Ltd. factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | PetroChina Lanzhou Petrochemical Co., Ltd. supplies this chemical in 25 kg PP woven bags with PE inner liner, palletized for transport. |
| Container Loading (20′ FCL) | Loading a 20′ FCL container with PetroChina Lanzhou Petrochemical products, ensuring proper dunnage, bracing, and securement for safe transit. |
| Shipping | PetroChina Lanzhou Petrochemical Co., Ltd. ships chemicals via road, rail, and sea using secure drums, ISO tanks, or bulk containers. Shipments comply with international safety regulations, include full documentation, hazard labeling, and Material Safety Data Sheets. Export cargo moves through major Chinese ports with proper inspection and tracking protocols. |
| Storage | PetroChina Lanzhou Petrochemical Co., Ltd. utilizes sealed, corrosion-resistant tanks and pressurized vessels for storing hydrocarbons, solvents, and polymer feedstocks. Storage areas feature strict fire-proofing, leak detection, and climate control to maintain product stability. Inventory is segregated by hazard class, with automated monitoring and emergency containment systems ensuring safe, compliant handling of volatile petrochemical materials. |
| Shelf Life | For PetroChina Lanzhou Petrochemical products, shelf life typically ranges 12–24 months when stored in sealed, dry, ventilated conditions. |
Application scenarios for PetroChina Lanzhou Petrochemical Co., Ltd. nitrile rubber (NBR) and carboxylated NBR latex product lines are described below. The scope is limited to actual industrial conversion routes in which NBR is used as the base elastomer in a dry-rubber compound, as an aqueous latex polymer, as a solvent-borne bonding polymer, or as a modifier in PVC sheathing. Each scenario records the applicable compliance framework, the quantitative addition level, the production process constraints, and the finished article category. Numerical values are industrially accepted typical ranges unless a specific grade datasheet is required.
What Limits Fuel-Vapour Hose Life When Gasoline Aromatic Content Exceeds 35%?
In automotive fuel hose construction, the NBR compound acts as the inner tube or cover layer. SAE J30:2022 governs hose assemblies for gasoline, alcohol-extended fuel, diesel, and biodiesel service; ISO 7840:2021 applies to marine fuel feed lines; fluid-contact performance is evaluated by ASTM D471-16a immersion in Fuel C for 70 h at 40°C. The formulation addition level places NBR at 100 phr, with carbon black N550 or N660 at 55–70 phr, TOTM plasticizer at 10–18 phr, zinc oxide at 5 phr, stearic acid at 1 phr, sulfur at 1.0–1.5 phr, and CBS accelerator at 0.8–1.5 phr. On a tangential internal mixer with 120 L chamber volume, the black and plasticizer are dispersed at a dump temperature of 125–135°C; the compound is then sheeted on a two-roll mill at 50–60°C before cold-feed extrusion on a vented extruder with L/D 16:1. A production-scale failure mode is scorch at the die head when stock temperature exceeds 105°C during interrupted line operation, producing rough inner-tube surfaces that reduce burst strength. Terminal finished product types include fuel filler neck hoses, evaporative emission vapour lines, and marine fuel feed hose assemblies. This NBR inner tube is not applicable for continuous exposure to gasoline containing more than 35% aromatic hydrocarbons at service temperatures above 100°C; a fluoropolymer barrier layer or FKM inner liner is required for such conditions.
Carboxylated NBR latex for examination-grade disposable gloves is processed as an aqueous dispersion rather than a dry rubber compound. Pinhole acceptance limits and freedom-from-hole requirements are defined in ASTM D6319-19 and EN 455-1:2020, with additional extractable-protein limits under EN 455-3:2015. The latex formulation addition rate is typically 100 phr dry rubber content, with zinc oxide at 0.8–1.5 phr, sulfur at 0.5–1.2 phr, ZDBC at 0.6–1.0 phr, tetramethylthiuram disulfide at 0.2–0.5 phr, and potassium hydroxide solution adjusted to maintain pH 8.5–9.0. On a continuous chain line operating at 2,000 formers/h, porcelain formers are preheated to 55–70°C, dipped into calcium nitrate coagulant containing 8–12% calcium nitrate, then immersed in diluted latex at 20–30% solids for 30–60 s. Foam collapse and pinholing are observed when the latex bath agitator runs below 120 rpm because entrained air is not cleared before the dip. Wet gel is leached at 40–60°C for 5–10 min to reduce extractable allergens, then cured at 105–120°C for 18–25 min. Terminal finished product types include medical examination gloves, cleanroom gloves, and general-purpose disposable gloves. The latex is shear-sensitive: dispersion above 1,500 rpm under high-shear mixing can generate coagulum, and pH below 7.8 leads to premature destabilisation.
Downhole Packer Element Compression Moulding Window for High-ACN NBR Formulations
For downhole packer sealing elements, high-acrylonitrile NBR compounds are qualified against NACE TM0297-2019 for sour-gas elastomer exposure and ISO 23936-1:2022 for oilfield non-metallic materials; wellhead equipment interfaces are specified in ISO 10423:2009. Compression set is measured under ASTM D395-16e1 Method B for 70 h at 100°C. The NBR addition level is 100 phr with bound acrylonitrile content between 36–40%, carbon black N774 or N550 at 60–90 phr, TOTM at 5–15 phr, zinc oxide at 5 phr, magnesium oxide at 2–3 phr, sulfur donor or low sulfur at 0.3–0.8 phr, and TMTD at 1.5–2.5 phr to achieve a semi-efficient cure. Production begins in a tangential mixer with a dump temperature of 120–135°C; after sheeting and cooling, preforms are compression moulded at 150–160°C under 15–20 MPa platen pressure for rheometer t90 plus 2 min. A recurring production issue in high-hardness 85 Shore A packer elements is backrinding at the part base when mould opening is delayed beyond 30 s after cure, especially in thick cross-sections above 20 mm. Terminal finished product types include retrievable bridge plug sealing elements, cementing wiper plugs, and liner hanger packer elements. Operational limits must be noted: unmodified NBR is not recommended for exposure to 20% hydrogen sulfide at 150°C; HNBR or FKM grades are substituted above 125°C in sour service.
Across footwear assembly lines, solvent-borne NBR bonding systems attach vulcanized rubber outsoles to leather, synthetic leather, or nonwoven counters. Bond strength is assessed by ISO 4587:2003 for lap-shear performance and ASTM D903-98(2017) for 180° peel strength. The NBR addition ratio in the final adhesive is 15–25 wt%, with zinc oxide at 2–3 wt%, alkylphenol resol tackifier at 5–8 wt%, and fumed silica at 0.5–1.0 wt% to suspend fillers. The solvent carrier is a ternary methyl ethyl ketone/acetone/toluene system at 50/30/20 by weight. High-torque dissolver equipment with tip speed 20–30 m/s is used to dissolve and disperse the polymer; the target viscosity is 2,500–4,000 mPa·s at 23°C. Factory application follows a two-side coating: both outsole and shoe upper are brushed or roller-coated, allowed an open time of 10–20 min, then reactivated at 60–80°C and pressed at 0.5–1.0 MPa for 15–30 s. A production failure is observed when excess solvent retention exceeds 30 mg/m², leading to bubble formation and bond-line whitening at the toe area during pressing. Terminal finished product types include leather dress shoes, safety footwear cupsoles, and vulcanized sports-shoe units. This route is not suitable for closed bonding cells with VOC limits below 5 g/m³ unless solvent recovery is installed.
When 33% ACN NBR Replaces Polychloroprene in Industrial Roll Covers, What Changes in Calender Shrinkage?
Replacement of polychloroprene with a 33% ACN NBR grade in industrial roll cover compounds shifts the calender shrinkage behaviour and oil-resistance profile. The roll cover specification is governed by ISO 6123-1:2021; hardness is measured under ISO 48-4:2018, tensile properties under ISO 37:2017, and tear strength under ISO 34-1:2022. The NBR addition level remains 100 phr, with carbon black N326 at 40–60 phr, precipitated silica at 10–20 phr, silane coupling agent at 0.5–1.0 phr, TOTM at 10–20 phr, phenolic resin hardener at 5–15 phr, sulfur at 0.5–1.0 phr, and TMTD at 1.0–1.5 phr. The downstream process uses a two-roll mill for pre-warming and a three-roll calender to build uncured sheet onto a primed steel core; after calendering, the wrapped roll is nylon-tape tensioned and autoclave-cured with saturated steam at 140–150°C for 4–6 h. Calender shrinkage in the NBR compound is typically 2–4% in machine direction, lower than the polychloroprene reference, which reduces edge cracking but requires re-adjustment of roll crowning. Terminal finished product types include squeeze rolls in steel pickling lines, coating application rolls, and textile padder rolls. In service, plasticizer extraction in mineral oil above 80°C raises Shore A hardness by 3–5 points and can cause surface microcracking on high-contact rolls, making TOTM the required plasticizer over DOP for this segment.
Cable Sheath Compounds Need Rebalancing of Flame Retardants When NBR Content Exceeds 35 phr in PVC Blends
When NBR content exceeds 35 phr in flexible PVC cable sheath formulations, flame-retardant loading must be rebalanced to maintain elongation and heat stability. Compliance for power cables up to 1 kV is defined in IEC 60502-1:2021, while single-wire flame testing is performed under IEC 60332-1-2:2015. The NBR addition ratio is 35–45 phr in a PVC/NBR base; the full formulation includes suspension PVC at 55–65 phr, TOTM or diisononyl phthalate at 40–70 phr, calcium carbonate at 40–80 phr, antimony trioxide at 5–8 phr, alumina trihydrate at 20–50 phr, calcium-zinc stabilizer at 5–8 phr, and antioxidant at 0.5–1.0 phr. The downstream process requires a Buss kneader for PVC pre-gelation and NBR dispersion; stock temperature is controlled at 120–140°C before a single-screw extruder with L/D 20:1 and a crosshead die applies the sheath over the core. A critical processing boundary is observed at 165°C: HCl evolved from PVC destabilizes the NBR phase, causing discoloration and reduced elongation at break. Terminal finished product types include flexible control cable sheaths, mining trailing cable jackets, and welding cable jackets. This blend is not suitable for cables requiring continuous conductor temperature above 90°C; crosslinked compounds are required beyond that limit.
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- PetroChina Lanzhou Petrochemical Co., Ltd. is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales3@ascent-chem.com.
PetroChina Lanzhou Petrochemical Co., Ltd. is an integrated refining and petrochemical operating entity in Gansu Province, People’s Republic of China, not a single product model in the conventional sense. The site supplies high-pressure low-density polyethylene, polypropylene, nitrile butadiene rubber, and high-cis polybutadiene rubber under grade designations such as LDPE 2426H, NBR 3305, and BR 9000. Nitrile butadiene rubber capacity at the Lanzhou complex is reported as 50 kt/a. The following treatment concentrates on the NBR product group because it illustrates the grade-dependent trade-offs in oil resistance, low-temperature behaviour, and cure-state control that dominate substitution decisions. Specification data are batch-specific and do not replace certificate-of-analysis values.
Which grade-level variables control oil resistance and low-temperature performance in the Lanzhou NBR product family?
Bound acrylonitrile content is the primary compositional variable. Commercial Lanzhou NBR grades span approximately 17% to 41% by mass bound ACN, measured by ISO 24698-1. Increasing ACN from 18% to 34% reduces volume swell in IRM 903 after 70 h at 100 °C under ASTM D471 from 25%–35% to below 10%. Low-temperature flexibility moves in the opposite direction. Low-ACN grades below 20% retain Gehman flexibility to approximately -50 °C by ASTM D1053, while 40% ACN grades stiffen near -20 °C to -25 °C. Mooney viscosity ML(1+4) 100 °C under ISO 289-1 ranges from 40 to 95 MU; this variable controls filler acceptance, shear heating, calender shrinkage, and die swell. The grade designator encodes the ACN target and Mooney target; a medium-high grade such as NBR 3305 therefore falls within the 33%–36% ACN band and a Mooney window near 45–55 MU.
| Property | Low-ACN grade | Medium-high ACN grade | High-ACN grade |
|---|---|---|---|
| Bound ACN, mass % | 17–20 | 33–36 | 39–42 |
| Mooney viscosity ML(1+4) 100 °C, MU | 40–60 | 45–55 | 70–95 |
| Volume swell after 70 h/IRM 903/100 °C, % | 25–35 | 8–12 | 4–7 |
| Gehman T10, °C | -48 to -42 | -26 to -22 | -18 to -14 |
| Tensile strength after sulfur cure, MPa | ≥12 | ≥13 | ≥14 |
Compounding the Lanzhou NBR product group on production-scale mixing equipment reveals viscosity-driven processing constraints. In a 75 L net chamber intermeshing Banbury mixer, high-Mooney batches above 80 MU require pre-mastication or a two-pass mix sequence to avoid scorch when dump temperature exceeds 120 °C. Fill factor for such grades is reduced to 0.70–0.75, and rotor speed is limited to 35–45 rpm to hold specific energy input below 0.12 kWh/kg. On a downstream two-roll mill, batch-to-batch Mooney variation of ±3 MU changes banding behaviour and cross-blend viscosity; operators compensate by adjusting nip gap by 0.2–0.5 mm. Cold-feed extrusion through a pin extruder with L/D 16 and barrel zones of 60 °C/70 °C/80 °C gives acceptable dimensional stability when Mooney viscosity is held within a 10 MU window. Pre-drying is required when surface moisture exceeds 0.5 mass % or ambient relative humidity exceeds 60%; otherwise trapped volatiles produce die-face porosity. Injection moulding of sulfur-cured NBR on a reciprocating screw machine with clamp force above 150 t uses barrel temperatures 70 °C–90 °C and mould temperatures 170 °C–190 °C. Production failure modes include scorched sprues from excessive screw recovery speed, pre-cured particles at barrel dead spots, and dimensional drift from undried compound; limiting screw recovery speed to 80–120 rpm and keeping compound moisture below 0.3 mass % reduce scrap rates.
Vulcanization kinetics vary with residual diene unsaturation and cure system. A sulfur system of 1.5–2.5 phr sulfur, 1.0–1.5 phr CBS, and 3–5 phr zinc oxide shows at 160 °C on a moving-die rheometer a scorch time ts2 of 1.2–2.8 min and tc90 of 6–12 min. Peroxide cure with dicumyl peroxide 2–4 phr gives lower compression set but is inhibited by phenolic antioxidants and requires air-free cure. Sulfur-cured compounds can release thiuram or carbamate residues under high-temperature service; peroxide-cured networks show lower extractable organic content. This cure-state boundary matters in sealing compounds tested by ASTM D395 Method B after 22 h at 100 °C.
When Lanzhou NBR is compared with SBR, CR, and HNBR in sealing and hose compounds
Substitution analysis should separate oil resistance from heat resistance and dynamic fatigue. Relative to emulsion SBR, Lanzhou NBR compounds retain tensile strength and elongation after immersion in IRM 901 and IRM 903 under ASTM D471; SBR compounds show excessive swelling and modulus loss because the styrene–butadiene backbone lacks the polar nitrile group. Against chloroprene rubber, medium-high ACN NBR gives lower volume swell in aliphatic hydrocarbons but inferior weather resistance and flame resistance; CR is preferred for refrigeration gaskets exposed to ozone and phosphate-ester lubricants. HNBR, formed by selective hydrogenation of the NBR backbone, outperforms standard Lanzhou NBR above 135 °C and in oxidised sour service, but hydrogenation raises cost and reduces tack, requiring peroxide cure systems and post-cure cycles. Compared with polybutadiene rubber grade BR 9000, Lanzhou NBR has substantially lower swelling in diesel, gasoline, and mineral-oil service; BR 9000 is used in tire tread and high-impact polystyrene impact modification where oil resistance is not required. The practical difference is the polar nitrile side group: it provides oil resistance but narrows the low-temperature service window and introduces sensitivity to aromatic solvents, ketones, and strong oxidising acids. A medium-high ACN NBR compound can be formulated to hardness 70–75 Shore A, tensile strength above 12 MPa, and compression set below 35% after 22 h at 100 °C; the same network is not specified for continuous exposure above 130 °C or for hot biodiesel blends above B20 because fatty acid methyl esters extract plasticizer and antioxidants, accelerating embrittlement. Nitrile rubber formulations should avoid amine-containing additives in zinc-free systems where premature crosslinking can occur.
Specific product usage follows the ACN/Mooney split. Low-ACN grades are specified for low-temperature seals and adhesives; medium-high grades for automotive fuel hose inner liners, O-rings, and oil seals; high-ACN grades for aggressive hydrocarbon service in oilfield packers and pump stators. For O-rings, a 70 Shore A medium-high NBR compound shows no visible porosity after post-cure at 150 °C, and compression set is measured under ASTM D395 Method B at 100 °C for 22 h. Oilfield packer compounds use high-structure carbon black N330 at 50–70 phr and plasticizer below 10 phr to resist extrusion failure at differential pressures above 34 MPa. Adhesive grades use low-Mooney NBR as a film former in methyl ethyl ketone systems; solution viscosity at 20% solids is a batch control point.
Adjacent to the synthetic rubber trains, the Lanzhou low-density polyethylene slate is specified by melt mass-flow rate under ISO 1133-1 at 190 °C/2.16 kg and density under ISO 1183-1. Grade LDPE 2426H is supplied as a blown-film resin with MFR 1.8–2.2 g/10 min and density 0.919–0.923 g/cm³; grade LDPE 2420H serves medium-clarity packaging and lamination film. Processing on a barrier-screw film extruder with L/D 30 uses barrel temperatures 150 °C–180 °C and die pressure below 25 MPa. Compared with linear low-density polyethylene film grades, Lanzhou LDPE has higher long-chain branching, broader molecular weight distribution, lower machine-direction tear at equivalent gauge, and improved bubble stability at frost-line heights below eight times die diameter. Polybutadiene rubber grade BR 9000 has high cis-1,4 content above 96% and Mooney viscosity 40–50 MU; it is used in tire tread modification and high-impact polystyrene where heat build-up and abrasion resistance dominate, and it provides no oil resistance compared with NBR. Polypropylene impact copolymer grades are used in automotive interior injection moulding; published data for this specific configuration is limited.
Compliance matrix and material boundary conditions
Compliance statements for Lanzhou NBR are compound-level evaluations because raw NBR does not carry food-contact or medical registration by itself. Sulfur-cured, carbon-black-filled compounds may meet FDA 21 CFR 177.2600 for repeated-use rubber articles under specified extraction limits, but zinc salts and accelerators must be reviewed case by case. REACH registration for polymer and monomer substances is managed through the PetroChina supply chain; no substance of very high concern is intentionally added. RoHS compliance is assessed under IEC 62321 methods for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE; antimony trioxide-free formulations are required where applicable. REACH dossier updates and food-contact suitability for specific grades should be confirmed against the current certificate of compliance because compound formulation, not raw NBR alone, determines final regulatory status.
| Standard/Regulation | Scope | Assessment basis |
|---|---|---|
| FDA 21 CFR 177.2600 | Repeated-use rubber articles | Extraction limits in specified food simulants |
| REACH 1907/2006 | Substance registration and SVHC screening | Supplier confirmation; no intentionally added SVHC |
| RoHS 2011/65/EU | Homogeneous material restrictions | IEC 62321 test series |
For automotive fuel hose inner liners, a medium-high ACN vulcanizate based on Lanzhou NBR is compounded with carbon black N550 and a sulfur donor system to reach hardness 70–75 Shore A, tensile strength above 12 MPa, and compression set below 35% after 22 h at 100 °C under ASTM D395 Method B. This compound is not specified for biodiesel blends above B20 because fatty acid methyl esters extract plasticizer and antidegradants, accelerating embrittlement; HNBR or FKM is substituted when service temperature exceeds 130 °C or when hot dimethyl silicone oil and amine-containing additives are present. Volatile outgassing from sulfur-cured NBR in closed automotive interiors should be assessed by VDA 278 before production release. These boundaries define the operational envelope for the Lanzhou NBR product group in fluid-contact parts.